Remove textrect attribute from textboxclass

Instead of duplicating the same variables over and over again,
Graphics::drawgui() can just make its own SDL_Rect. It's not that hard.

As far as I can tell, textrect was always being properly kept up to date
by the time Graphics::drawgui() got around to rendering
(textboxclass::resize() keeps being called a LOT), so this shouldn't be
a noticeable change from the user perspective.

desktop_version/src/Graphics.cpp

@@ -855,8 +855,9 @@ void Graphics::drawgui(void)
         }
         else
         {
+            SDL_Rect textrect = {textbox[i].xp, textbox[i].yp, textbox[i].w, textbox[i].h};
 
-            FillRect(backBuffer,textbox[i].textrect, textbox[i].r/6, textbox[i].g/6, textbox[i].b / 6 );
+            FillRect(backBuffer, textrect, textbox[i].r/6, textbox[i].g/6, textbox[i].b / 6 );
 
             drawcoloredtile(textbox[i].xp, textbox[i].yp, 40, textbox[i].r, textbox[i].g, textbox[i].b);
             drawcoloredtile(textbox[i].xp+textbox[i].w-8, textbox[i].yp, 42, textbox[i].r, textbox[i].g, textbox[i].b);

desktop_version/src/Textbox.cpp

@@ -21,10 +21,6 @@ textboxclass::textboxclass(void)
     tg = 0;
     tb = 0;
     max = 0;
-    textrect.x = 0;
-    textrect.y = 0;
-    textrect.w = 0;
-    textrect.h = 0;
 }
 
 void textboxclass::centerx(void)
@@ -121,10 +117,6 @@ void textboxclass::resize(void)
     lw = max;
     w = (max +2) * 8;
     h = (line.size() + 2) * 8;
-    textrect.x = xp;
-    textrect.y = yp;
-    textrect.w = w;
-    textrect.h = h;
 }
 
 void textboxclass::addline(std::string t)

desktop_version/src/Textbox.h

@@ -35,7 +35,6 @@ public:
     int xp, yp, lw, w, h;
     int r,g,b;
     int tr,tg,tb;
-    SDL_Rect textrect;
     int timer;
 
     float tl;